Question

In a test tube there is HCl
A person adds phenolphthalein indicator.

Name the type of chemical reaction.

Answer 1

Phenolphthalein is a weak acid, which is why when it is added in a strong base, it gives pink color and the color gets intense as the PH of the base increases. ... By adding HCL in the solution, the pink color of phenolphthalein will disappear. This is also called Acid- Base Titration